code: def pre_request():
      file_name = f"dynamo.log"
      log_file = open(file_name, "a+")
  
      # Clear the contents of the file by truncating it
      log_file.truncate(0)
  
      # Save the original stdout so that we can restore it later
      original_stdout = sys.stdout
      # Redirect stdout to the file
      sys.stdout = log_file
  
      return original_stdout, log_file, file_name
  
file_path: litellm/litellm/tests/test_dynamodb_logs.py
imports: import sys
  import os
  import io, asyncio
  from litellm import completion
  import litellm
  import time, random
  import pytest
  import re
label_desc: Use image node_id 1 for calling a global function with example usage: pre_request() and returns: original_stdout,  log_file,  file_name